Strap a personal trainer to your wrist.

Whether you’re a newcomer prepping for your first marathon or a seasoned vet looking for strategic gains, Garmin’s Forerunner 630 is the ideal companion for runners who want to train smarter and harder. The Forerunner 630 tracks all the usual metrics (pace, distance, calories, and time), but when coupled with the ANT+ heart rate strap, it offers a wide range of physiological readings that significantly boost your training. It covers things like lactate threshold, VO2 max estimate, performance condition, ground time contact and stride length.

It also registers a stress score, which allows you to compare workouts against one another, and a built-in recovery advisor lets you know when you’re going too hard, notifying you when it’s the optimal time for rest. The Forerunner 360 can be automatically synced with Garmin’s online training community, Garmin Connect, which makes storing and assessing your data quick and easy. If you’re preparing for triathlon, the Forerunner can be synced with a cycling cadence and speed sensor and mounts easily to your handlebars. When you’re not training, the Forerunner 630 is still equipped to handle all the activities of daily life, providing a step counter, activity monitor, and sleep tracker. Finally, the Forerunner 630 smartphone compatibility allows you to receive notifications at your wrist, so you never have to break stride.